[Chainsaw13]

I went through this same situation a few years back looking for a mattress. Best thing to do is go to a store with a large variety and try each one out to find the firmness level you like. On the ones you do like initially, lay on them for 10-15 minutes if possible. This will give you a better indication of how well you'll like the mattress than just laying on them for a minute or so.

Now one thing you will find is you can't comparison shop to much between stores. Each will have their own line of the same brands. This is done intentionally to make it hard for the customer. It also allows them to run their ridiculous sales since a competitior can't match. You'll also find that there's a huge markup on mattresses. Even the sale prices are inflated with what you can find online. I bought mine from a online place called Sweet Dreams Mattress. If you find a brand you do like, they can cross reference it with their own models and you can get the same thing for a lot better price. I think the mattress I got went for $900 at the store, i got it for under $700 delivered. Well worth checking out.